test/MC/MachO/x86_32-optimal_nop.s

   1 // RUN: llvm-mc -triple i386-apple-darwin9 -mcpu=pentiumpro %s -filetype=obj -o - | llvm-readobj --file-headers -S --sd -r --symbols --macho-segment --macho-dysymtab --macho-indirect-symbols | FileCheck %s
   2
   3 # 1 byte nop test
   4         .align 4, 0 # start with 16 byte alignment filled with zeros
   5         ret
   6         # nop
   7         # 0x90
   8         .align 1, 0x90
   9         ret
  10 # 2 byte nop test
  11         .align 4, 0 # start with 16 byte alignment filled with zeros
  12         ret
  13         ret
  14         # xchg %ax,%ax
  15         # 0x66, 0x90
  16         .align 2, 0x90
  17         ret
  18 # 3 byte nop test
  19         .align 4, 0 # start with 16 byte alignment filled with zeros
  20         ret
  21         # nopl (%[re]ax)
  22         # 0x0f, 0x1f, 0x00
  23         .align 2, 0x90
  24         ret
  25 # 4 byte nop test
  26         .align 4, 0 # start with 16 byte alignment filled with zeros
  27         ret
  28         ret
  29         ret
  30         ret
  31         # nopl 0(%[re]ax)
  32         # 0x0f, 0x1f, 0x40, 0x00
  33         .align 3, 0x90
  34         ret
  35 # 5 byte nop test
  36         .align 4, 0 # start with 16 byte alignment filled with zeros
  37         ret
  38         ret
  39         ret
  40         # nopl 0(%[re]ax,%[re]ax,1)
  41         # 0x0f, 0x1f, 0x44, 0x00, 0x00
  42         .align 3, 0x90
  43         ret
  44 # 6 byte nop test
  45         .align 4, 0 # start with 16 byte alignment filled with zeros
  46         ret
  47         ret
  48         # nopw 0(%[re]ax,%[re]ax,1)
  49         # 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00
  50         .align 3, 0x90
  51         ret
  52 # 7 byte nop test
  53         .align 4, 0 # start with 16 byte alignment filled with zeros
  54         ret
  55         # nopl 0L(%[re]ax)
  56         # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00
  57         .align 3, 0x90
  58         ret
  59 # 8 byte nop test
  60         .align 4, 0 # start with 16 byte alignment filled with zeros
  61         ret
  62         ret
  63         ret
  64         ret
  65         ret
  66         ret
  67         ret
  68         ret
  69         # nopl 0L(%[re]ax,%[re]ax,1)
  70         # 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00
  71         .align 3, 0x90
  72         ret
  73 # 9 byte nop test
  74         .align 4, 0 # start with 16 byte alignment filled with zeros
  75         ret
  76         ret
  77         ret
  78         ret
  79         ret
  80         ret
  81         ret
  82         # nopw 0L(%[re]ax,%[re]ax,1)
  83         # 0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00
  84         .align 4, 0x90
  85         ret
  86 # 10 byte nop test
  87         .align 4, 0 # start with 16 byte alignment filled with zeros
  88         ret
  89         ret
  90         ret
  91         ret
  92         ret
  93         ret
  94         ret
  95         # nopw %cs:0L(%[re]ax,%[re]ax,1)
  96         # 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00
  97         .align 4, 0x90
  98         ret
  99 # 11 byte nop test
 100         .align 4, 0 # start with 16 byte alignment filled with zeros
 101         ret
 102         ret
 103         ret
 104         ret
 105         ret
 106         # nopw %cs:0L(%[re]ax,%[re]ax,1)
 107         # 0x66, 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00
 108         .align 4, 0x90
 109         ret
 110 # 12 byte nop test
 111         .align 4, 0 # start with 16 byte alignment filled with zeros
 112         ret
 113         ret
 114         ret
 115         ret
 116         # nopw 0(%[re]ax,%[re]ax,1)
 117         # nopw 0(%[re]ax,%[re]ax,1)
 118         # 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00,
 119         # 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00
 120         .align 4, 0x90
 121         ret
 122 # 13 byte nop test
 123         .align 4, 0 # start with 16 byte alignment filled with zeros
 124         ret
 125         ret
 126         ret
 127         # nopw 0(%[re]ax,%[re]ax,1)
 128         # nopl 0L(%[re]ax)
 129         # 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00,
 130         # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00
 131         .align 4, 0x90
 132         ret
 133 # 14 byte nop test
 134         .align 4, 0 # start with 16 byte alignment filled with zeros
 135         ret
 136         ret
 137         # nopl 0L(%[re]ax)
 138         # nopl 0L(%[re]ax)
 139         # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00,
 140         # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00
 141         .align 4, 0x90
 142         ret
 143 # 15 byte nop test
 144         .align 4, 0 # start with 16 byte alignment filled with zeros
 145         ret
 146         # nopl 0L(%[re]ax)
 147         # nopl 0L(%[re]ax,%[re]ax,1)
 148         # 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00,
 149         # 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00
 150         .align 4, 0x90
 151         ret
 152
 153         # Only the .text sections gets optimal nops.
 154         .section        __TEXT,__const
 155 f0:
 156         .byte 0
 157         .align  4, 0x90
 158         .long 0
 159
 160 // CHECK: File: <stdin>
 161 // CHECK: Format: Mach-O 32-bit i386
 162 // CHECK: Arch: i386
 163 // CHECK: AddressSize: 32bit
 164 // CHECK: MachHeader {
 165 // CHECK:   Magic: Magic (0xFEEDFACE)
 166 // CHECK:   CpuType: X86 (0x7)
 167 // CHECK:   CpuSubType: CPU_SUBTYPE_I386_ALL (0x3)
 168 // CHECK:   FileType: Relocatable (0x1)
 169 // CHECK:   NumOfLoadCommands: 4
 170 // CHECK:   SizeOfLoadCommands: 312
 171 // CHECK:   Flags [ (0x0)
 172 // CHECK:   ]
 173 // CHECK: }
 174 // CHECK: Sections [
 175 // CHECK:   Section {
 176 // CHECK:     Index: 0
 177 // CHECK:     Name: __text (5F 5F 74 65 78 74 00 00 00 00 00 00 00 00 00 00)
 178 // CHECK:     Segment: __TEXT (5F 5F 54 45 58 54 00 00 00 00 00 00 00 00 00 00)
 179 // CHECK:     Address: 0x0
 180 // CHECK:     Size: 0x151
 181 // CHECK:     Offset: 340
 182 // CHECK:     Alignment: 4
 183 // CHECK:     RelocationOffset: 0x0
 184 // CHECK:     RelocationCount: 0
 185 // CHECK:     Type: Regular (0x0)
 186 // CHECK:     Attributes [ (0x800004)
 187 // CHECK:       PureInstructions (0x800000)
 188 // CHECK:       SomeInstructions (0x4)
 189 // CHECK:     ]
 190 // CHECK:     Reserved1: 0x0
 191 // CHECK:     Reserved2: 0x0
 192 // CHECK:     SectionData (
 193 // CHECK:       0000: C390C300 00000000 00000000 00000000  |................|
 194 // CHECK:       0010: C3C36690 C3000000 00000000 00000000  |..f.............|
 195 // CHECK:       0020: C30F1F00 C3000000 00000000 00000000  |................|
 196 // CHECK:       0030: C3C3C3C3 0F1F4000 C3000000 00000000  |......@.........|
 197 // CHECK:       0040: C3C3C30F 1F440000 C3000000 00000000  |.....D..........|
 198 // CHECK:       0050: C3C3660F 1F440000 C3000000 00000000  |..f..D..........|
 199 // CHECK:       0060: C30F1F80 00000000 C3000000 00000000  |................|
 200 // CHECK:       0070: C3C3C3C3 C3C3C3C3 C3000000 00000000  |................|
 201 // CHECK:       0080: C3C3C3C3 C3C3C366 0F1F8400 00000000  |.......f........|
 202 // CHECK:       0090: C3000000 00000000 00000000 00000000  |................|
 203 // CHECK:       00A0: C3C3C3C3 C3C3C366 0F1F8400 00000000  |.......f........|
 204 // CHECK:       00B0: C3000000 00000000 00000000 00000000  |................|
 205 // CHECK:       00C0: C3C3C3C3 C3662E0F 1F840000 00000090  |.....f..........|
 206 // CHECK:       00D0: C3000000 00000000 00000000 00000000  |................|
 207 // CHECK:       00E0: C3C3C3C3 662E0F1F 84000000 00006690  |....f.........f.|
 208 // CHECK:       00F0: C3000000 00000000 00000000 00000000  |................|
 209 // CHECK:       0100: C3C3C366 2E0F1F84 00000000 000F1F00  |...f............|
 210 // CHECK:       0110: C3000000 00000000 00000000 00000000  |................|
 211 // CHECK:       0120: C3C3662E 0F1F8400 00000000 0F1F4000  |..f...........@.|
 212 // CHECK:       0130: C3000000 00000000 00000000 00000000  |................|
 213 // CHECK:       0140: C3662E0F 1F840000 0000000F 1F440000  |.f...........D..|
 214 // CHECK:       0150: C3                                   |.|
 215 // CHECK:     )
 216 // CHECK:   }
 217 // CHECK:   Section {
 218 // CHECK:     Index: 1
 219 // CHECK:     Name: __const (5F 5F 63 6F 6E 73 74 00 00 00 00 00 00 00 00 00)
 220 // CHECK:     Segment: __TEXT (5F 5F 54 45 58 54 00 00 00 00 00 00 00 00 00 00)
 221 // CHECK:     Address: 0x160
 222 // CHECK:     Size: 0x14
 223 // CHECK:     Offset: 692
 224 // CHECK:     Alignment: 4
 225 // CHECK:     RelocationOffset: 0x0
 226 // CHECK:     RelocationCount: 0
 227 // CHECK:     Type: Regular (0x0)
 228 // CHECK:     Attributes [ (0x0)
 229 // CHECK:     ]
 230 // CHECK:     Reserved1: 0x0
 231 // CHECK:     Reserved2: 0x0
 232 // CHECK:     SectionData (
 233 // CHECK:       0000: 00909090 90909090 90909090 90909090  |................|
 234 // CHECK:       0010: 00000000                             |....|
 235 // CHECK:     )
 236 // CHECK:   }
 237 // CHECK: ]
 238 // CHECK: Relocations [
 239 // CHECK: ]
 240 // CHECK: Symbols [
 241 // CHECK:   Symbol {
 242 // CHECK:     Name: f0 (1)
 243 // CHECK:     Type: Section (0xE)
 244 // CHECK:     Section: __const (0x2)
 245 // CHECK:     RefType: UndefinedNonLazy (0x0)
 246 // CHECK:     Flags [ (0x0)
 247 // CHECK:     ]
 248 // CHECK:     Value: 0x160
 249 // CHECK:   }
 250 // CHECK: ]
 251 // CHECK: Indirect Symbols {
 252 // CHECK:   Number: 0
 253 // CHECK:   Symbols [
 254 // CHECK:   ]
 255 // CHECK: }
 256 // CHECK: Segment {
 257 // CHECK:   Cmd: LC_SEGMENT
 258 // CHECK:   Name:
 259 // CHECK:   Size: 192
 260 // CHECK:   vmaddr: 0x0
 261 // CHECK:   vmsize: 0x174
 262 // CHECK:   fileoff: 340
 263 // CHECK:   filesize: 372
 264 // CHECK:   maxprot: rwx
 265 // CHECK:   initprot: rwx
 266 // CHECK:   nsects: 2
 267 // CHECK:   flags: 0x0
 268 // CHECK: }
 269 // CHECK: Dysymtab {
 270 // CHECK:   ilocalsym: 0
 271 // CHECK:   nlocalsym: 1
 272 // CHECK:   iextdefsym: 1
 273 // CHECK:   nextdefsym: 0
 274 // CHECK:   iundefsym: 1
 275 // CHECK:   nundefsym: 0
 276 // CHECK:   tocoff: 0
 277 // CHECK:   ntoc: 0
 278 // CHECK:   modtaboff: 0
 279 // CHECK:   nmodtab: 0
 280 // CHECK:   extrefsymoff: 0
 281 // CHECK:   nextrefsyms: 0
 282 // CHECK:   indirectsymoff: 0
 283 // CHECK:   nindirectsyms: 0
 284 // CHECK:   extreloff: 0
 285 // CHECK:   nextrel: 0
 286 // CHECK:   locreloff: 0
 287 // CHECK:   nlocrel: 0
 288 // CHECK: }